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remote ballast is the box with coil and capacitor; the energy source for the light bulb. It called remote ballast, because it can seperated with the light bulb with the power cord. by doing that you can have your light bulb hang on the tang and the ballast on the ground. That way, it can reduce...

:happyfish for what i understand, Metal Halide is the best for coral. The different between Metal Halide and T-5 is MH can provide more concentrated light/energy in one spot where T-5 couldn't do. Even with the same watt but you need to consider how much energy will lost during the lights...

arr.....Yes, I know metal halide needs ballast. But I want to know if i need to use a RemoteBallast or I can use the common ballast that will attached next to the light bulb. :confused: Thanks

Is it possible to use a 175W MH light without using a remote ballast?? Will it generate too much heat that can affect the water Temp?

I am planing to buy a metal halide bulb, does anyboby know what kelvin for 50/50? 14k or 10k??? Thanks

hi everybody, I am new to here, does anybody know that if hermit crab is safe with coral???